Construction Plan for Prefabricated Houses in Xinjiang
The construction plan for prefabricated houses in Xinjiang needs to incorporate regional characteristics, utilizing modular design and prefabricated technology. The specific plan is as follows:
I. Technical System and Material Selection
The structural system centers around a high-strength galvanized steel frame (such as Q355B low-alloy steel), paired with a portal frame or light frame structure. It offers flexible spans and low foundation requirements, adapting to complex terrains like the Gobi Desert and wastelands. Modular units are standardized in design, with dimensions of 6055mm×2930mm×2896mm, supporting lengthening or corner combinations. In the enclosure system, the roof and walls employ 150mm-thick flame-retardant polyurethane sandwich panels, with a thermal conductivity coefficient ≤0.022W/m·K, capable of withstanding temperature variations from -35℃ to 38℃. The window and door system is equipped with 65-series thermal-break aluminum alloy windows and 5+12A+5 Low-E insulated glass, achieving an airtightness rating of ≥7. The ground insulation adopts a double-layer structure (100mm-thick XPS extruded polystyrene board + 20mm vacuum insulation panel), with a compressive strength of ≥250kPa. For wind and sand resistance and seismic design, the module connection nodes have a pull-out resistance of ≥15kN, and the roof employs a through-bolt fixing system, with a basic wind pressure value of 0.75kN/㎡. Seismic dampers are installed at beam-column joints, and the frame material undergoes sandblasting treatment (with a slip coefficient of ≥0.45), meeting the requirements for an 8-degree seismic fortification intensity. The joint seams adopt a “triple-seal” process (PU foam + EPDM tape + weather-resistant sealant), and the fresh air system has a filtration efficiency of ≥85%.
II. Construction Process and Key Technologies
During the factory prefabrication and transportation phase, components are manufactured with millimeter-level precision control through intelligent production lines, and BIM technology is utilized for collaborative design, production, and installation. Module disassembly follows the principles of a weight ≤25t and dimensions that fit within highway transportation limits. During on-site assembly, the foundation in permafrost regions adopts a “replacement + insulation” composite process (excavating 1.5 meters of permafrost and backfilling with graded gravel while laying XPS insulation boards). Modules are installed using 10.9-grade M20×80 high-strength bolts, combined with seismic dampers and expansion joint designs (with a 50mm joint width every 30 meters). Mechanical and electrical pipelines undergo BIM clash detection to eliminate over 95% of conflicts, achieving integrated wiring. Seasonal construction measures include: preheating concrete mixing water to 80℃ in winter, with a pouring temperature of ≥10℃, and covering with electric blankets + flame-retardant cotton quilts for curing; adopting a “reflective coating + ventilated air layer + insulation layer” triple structure for the roof in summer, with a solar radiation reflectivity of ≥0.8; conducting blood oxygen tests on construction personnel in plateau regions (above 2,500 meters above sea level) and equipping them with portable oxygen generators.
III. Quality and Environmental Protection Control
Quality assurance is achieved through factory production, reducing on-site wet work and ensuring high component precision and quality stability. A triple waterproofing standard is implemented (structural self-waterproofing + modified asphalt membrane + aerated concrete protective layer). Environmental protection measures include establishing a material grading and reserve system, with special materials (such as antifreeze admixtures) requiring plateau applicability test reports. The construction bidding evaluation method is adjusted, eliminating financial status reviews and strengthening the scoring for similar project performance. This plan has been applied to a 6,800-square-meter modular housing project in the High-Tech Zone of Urumqi City, with a factory prefabrication rate of 85% and an on-site assembly rate exceeding 90%, providing reliable support for warehousing and logistics, agricultural storage, and industrial facilities in Xinjiang.
